High pressure lubricating device



Feb. 19, 1935. BlZZARRH 1,992,052

HIGH PRESSURE LUBRICATING DEVICE Original Filed June 17, 1951 Z Z1 Z2 INVENTQR.

' 45 ATTORNEY Patented Feb. 19, 1935 UNITED STATES "PATENT OFFICE HIGH PRESSURE LUBRICATING DEVICE Anthony Bizzarri, New York, N. Y.

Application June 17, 1931, Serial No. 544,976

Renewed July 10, 1934 j 7 Claims. (01. 221-471) character specified which are simple in construction, which may be readily, conveniently and economically fabricated and assembled, and which are highly efiicient in operation, the operation of the devices of the present invention in certain of their embodiments being characterized by the ease with which such devices may be loaded with i the grease or other lubricant or other substances which are to be pumped by means of such devices, the positive nature of the pumping action, the efficient lubrication of the devices permitting minimizing of clogging, avoiding overheating, stoppages, air pockets and other hindrances and interferences in the operation of the devices of the present invention, the high rate of delivery of the lubricant or equivalent substances rendered possible by the use of the devices of the present invention, and the efiicient control and low power conception of the high pressure pumps of the present invention, even in the case of the heaviest lubricant, such as those specifically referred to above. Other objects and advantages of the devices of the present invention, particularly as hereinafter set forth in detail, will in part be pointed out in detail hereinafter and will in part be obvious to those skilled in the art to which the present invention relates.

In the accompanying specification I shall describe, and in the annexed drawing show, an illustrative embodiment of the present invention. It is, however, to be clearly understood that my invention is not limited to the specific'embodiment thereof hereinshown and described for purposes of illustration only.

Referring to the drawing, the single figure the form of a casting which contains the various operative parts of the device, except the grease tank 18.

tank itself which it supports. The crank or eccentric casing 13 serves also as a hollow casing or reservoir for containing the oil or other fluid which serves as a hydraulic fluid in the operation of the device, in amanner which will later be described in this specification. 14 indicates a portion of the casting 13 provided with the annular or other suitable groove 15 on its upper face communicating with certain apertures 16 in the bottom portionl'l of the tank 18 for the heavy or other lubricant which it is the purpose of the electrically'or otherwise driven pump of the present invention to feed. The tank 18 embodies the top 19 which includes on the under surface thereaction of the hydraulic fluid in the manner sub-.

sequently described. It also serves to retain all of the lubricant within the upper space 21 of the The cover 19 and tank 18- is, held in place by means of the central bolt 22 which is hollow, as indicated at 23, having the port 24 at the upper end of the, hollow rod 22communieating with the space 21 adjacent the top thereof. The lower end 25 of the hollow rod 22 is threaded so as to fit into the threaded aperture 26 with which the casting portion .14 is provided. At 27 there is provided a flange portion to position the tank by pressure against the bottom 1'7 thereof, thus to .seatthe parts properly. I

At 28 I have provided the hollow bolt 22 with a flange, portion to seat the top 19 of the tank against the side walls of the tank18. The upper portion 29 of the hollow bolt 22 is threaded to be received within a similarly threaded aperture 31 in the head or boss 30 which is provided withthe handles 32 and 33 for'manipulatin'g the hollow bolt 22, either to remove the cover in one direction of its operation, or tofasten the cover again in place in the other direction of its operation. It may here be'stated that a ring -may be used on the under surface ofthe cover 19 in asso-U ciation with the boss 30 so that when the boss is operated to permit thedvice to be charged,:the cover is removed with the boss, and similarly when the device is to be closed again after it has been charged, the boss carrying the cover may be positioned for sealing the tank again.

Thehollow bolt 22, which is fixedly secured in the threaded aperture 26 in the casting portion 14, in the manner already described, carries the follower 34 which is moved upwardly under the action of the hydraulic pressure of the lubricating or other fluid contained in the casting 13 and may be pushed downwardly when the tank is filled again by hand or by the action of a suitable spring which will serve to return it to its normal position near the bottom of the tank 18, which spring is not here deemed necessary to be shown. The follower 34 is provided on its under surface with the hollow nipple 35 which has associated therewith the seal 36 in the form of a rubber or leather fitting over the nipple 35 in contact with a portion of the hollow rod 22 beneath the nipple 35. Like the cover 19, the follower 34 is provided with the selfexpanding sealing cup 3'7 which may be made of rubber, leather or other suitable material, and which serves to seal the hydraulic fluid within the lower portion 38 of the tank 19 where the hydraulic fluid is received in the act of discharging lubricant from the upper space 21 in the tank 18, which thus prevents the lubricating oil or other fluid from escaping from the space 38 into the space 21 and thus mixing with the lubricant in the upper space 21.

39 indicates a portion of the casting 13 which serves as a cylinder for the pumping mechanism for pumping the lubricating oil or other hydraulic fluid from the reservoir 40 through the delivery pipe 41 through the ports and valve control mechanism subsequently described, into the annular port 15 whence it flows through the inlet port 16 in the bottom 17 of the container 18 and thus into the space 38 for the hydraulic fluid. The cylinder 39 is provided with the intake ports 42 and 43 leading into the cylinder space 44 within which reciprocates the piston 45 under the action of the eccentric 12. The piston 45 is preferably hollow and may contain within it the compression spring 46, the upper end of which bears against the inner face of the end 47 of the piston 45, while the lower end of which bears against the inner face 48 of the sealing nut 49 which serves to close the aperture 50 with which the outer portion 51 of the casting 13 is provided. In the portion 52 of the casting 13 I provide a check valve 53 positioned by means of the spring 54 so as to control the port 55 adjacent the bottom of the cylinder space 44, 56 indicating a by-pas-s port also provided adjacent the bottom of the cylinder space 44 for a purpose to be described in substantial detail later in this specification.

The ball valve 53 and the spring 54 are positioned in the substantially cylindrical space 57 which is closed by the sealing nut 58 in the manner, made clear in the drawing. The cylindrical space 5'7 communicates with the space 59 m the bend 60 of the delivery conduit 41 already refered to. At its other end, the delivery conduit 41 includes the bend 61 provided with the threaded nipple 62 communicating with the port 63 in the portion 64 of the casting 13. The portion 64 of the casting 13 just referred to embodies a petcock 65 operated by means of the handle 66 and embodying therein the substantially L-shaped port or passageway 6'7 so that when the pet-cock is in one position, such as that shown in the drawing, the hollow of the tube 41 will by means of the L-shaped port 6'7 and the port 68 of the I casting portion 14 communicate with the annular port 15 in such casting portion 14 and thus, therefore, the inlet ports 1 6l6 with the lower interior portion 38 of the tank 18. The position just referred to corresponds to the charging of hydraulic fluid underpressure into the lower portion 38 of the tank 18 and thus to the discharge of lubricant under pressure from the upper portion 21 of the tank 18.

In the other position of the pet-cock 65, the L-shaped port 67 will bring the port 68 in the casing portion 14 in communication by means of the annular port 15 with the inlet port 1616 and thus with the interior portion 38 of the tank 18, into communication with the discharge port 69 which will serve to restore hydraulic fluid to the reservoir space 40 through the discharge port '70 into the upper space '71 of the reservoir and thus into the lower space 40 thereof where the supply of hydraulic fluid, such as lubricating oil or the like, is maintained.

The by-pass port 56 communicates with the interior substantially cylindrical space '72 in the casting portion '73 which is sealed at its open end '74 by means of the adjusting screw '75 having the knurled head '76 by means of which it may be operated. The adjusting screw serves toadjust the tension of the compression spring 77 within the cylindrical space 72, such compression spring 77 acting against the ball valve '78 which serves as-a check valve controlling the by-pass port 56.

The purpose of the by-pass port 56 and its associated adjustable valve mechanism is to permit the by-passing of hydraulic fluid when the pressure in the reservoir 40 exceeds the pressure for which the spring 7'7 is set by the adjustment of the screw '75. The hydraulicfiuid thus bypassed through the by-pass port '56 and past the valve mechanism referred to passes through the by-pass conduit '79 through the bend 80 through the threaded nipple 81 into the cylindrical space 82 provided within the casting portion 83 which contains the mechanism for pumping the lubricant from the upper space 21 in the tank 18, thereby the hydraulic fiuid in the form of lubricating oil serves to lubricate the operative portions of' the grease-pumping mechanism contained in the cylindrical space 82. The excess of hydraulic fluid in the form of lubricating oil passes through the port 84 and thence into the reservoir 40 where the lubricating oil or equivalent hydraulic fluid is stored.

The casting portion 83 comprises a cylinder which, as already indicated, contains the pump mechanism for pumping the grease from the upper space 21 in the tank 18. The casting portion 83 is provided with the stepped portion 85 below which the diameter of the cylinder is less than it is above the stepped portion 85, the cylindrical space above the stepped portion 85 being designated by reference character 86.

Within the cylindrical space 82 below the stepped portion 85 which carries a washer 87 which in turn carries a leather sealing cup 88 is the compression spring 39 resting on the spring retainer 90 held in position by a pin (not shown) passing through the plunger 92.

The plunger 92 reciprocates within a casing 93, the lower portion 94 of which is of reduced diameter and the upper portion 95 of enlarged external diameter. The upper portion 95 of enlarged external diameter is in the form of a cup, the upper portion 96 of which in the form of a tapered flange rests in the correspondingly tapered seat 9'7 with which the interior of the casting portion 98 is provided. 99 designates a steel bushing which fits into the portion 96 of the cylinder' 93 and which supports the check valve mechanism shortly to be described.

The check valve mechanism which is contained within the hollow lock nut 100 which contains the groove 101 by means of which the hollow lock nut maybe manipulated is provided with the internal space 102 which contains the comcharged through the ports 106 with which the reduced lower portion 107 of the hollow lock nut 100 is provided. While four such discharge ports 106 have here been shown, their number may be varied as desired. From the hollow ports 106 withwhich the lower portion of reduced diameter 107 of the hollow lock nut 100 is provided, the grease or equivalent lubricant passes through the discharge outlet 108 through the threaded nipple 109 into the hose or other suitable conduit 110 from which it is discharged at the end 111 which may, if desired, carry the bayonet or other suitable coupling 112.

The piston 92 has the lower end thereof in will constantly be maintained against the operative surface of the eccentric l2 and thus operated thereby. except when the cam mechanism shortly to be described maintains the piston cup 113 and thus the plunger 92 out of operative contact with the eccentric 12. under normal conditions, the plunger 45 is kept constantly in action, thus serving to maintain hydraulic fluid constantly available for immediate operation and also to lubricate constantly the lower portion of the plunger 92, while the piston cup 113 of the plunger 92 in engagement with the inner surface thereof is not in action except when, by operation of, the cam mechanism subsequently describe, it is desired to put the same into action.

The various parts of the grease-pumping mechanism described above are maintained in proper assembled relation by means of the hollow lock nut 100 already described, which is suitably threaded into the casting portion 98 and thus keeps the various parts of the grease-pumping mechanism in proper assembled operative relation. I prefer, however, to provide the hollow sealing nut or cap screw 114, which is threaded over theupper externally threadedportion of the hollow lock nut 100, thus completing the assembly of the grease-pumping mechanism.

115 indicates a port which communicates by way of the hollow portion 23 of the hollow nut 22 and the outlet port 24 communicating with the interior portion 21 of the tank 18 to permit the discharge of heavy grease or other lubricant under the action of the hydraulic fluid in the lower space 38 of the tank 18', thence through the port 115 into the cylindrical space 86 and thence under the action of the plunger 92 into the space 102 immediately below the check valve mechanism' past which it goes through the outlet ports 106 through the dischargeport 108 through the nipple 109, thus into the conduit 110 from which it escapes through the end 111 past the coupling the grease past the upper end of the plunger 92 into the space 102 may be effected by means of the'ports 1160f which any desired number may It may be stated that 1 It may here be stated that the passage'of .be provided, here shown as four, in theupper portion of the casing 95.

The operation of the device may be controlled by any suitable means, such as the means illustrated in the drawing and comprising, for example, the cam 117 held by the pins 118 and 119 V which are secured inlany suitable portion of the casting 13 The cam 117 is in turn pivoted by means of the pin 120 to the rod 121 which slides in an open or other suitable bearing 122 with which the casting 13 may be provided. On the inner face of the casting: surrounding the rod 121 is a compression spring 123 held by the pin 124 passing through the rod 121, the spring 123 being thus held in position between the inner surface of the casting 13-around the rod 121 and the pin 124. Normally, under the action of the spring 123 the cam 117 will be pushed forwardly to the right in the single figure of the drawing and the end 117 of the cam 117 will engage the under surface of the piston cup 113, thus to disengage the cup 113 and the plunger mounted within the same from the eccentric 12 which will thus no longer be effective to operate the grease pumping mechanism. It will be noted that the cam 117 by means of; the elongated slot 118 with which it is provided and the similarly elongated opening 119 which is provided, around the pins 118 and 119, respectively, serves as a sort of lever which goes forward and; then drops to a position which will render effective its action to disengage the piston cup 113 from the operativesurface of the eccentric 12 by providing a space between the lower surface of. thecup 113 and the surface of the eccentric 12.

In order to operate the grease-pumping mechanism I provide means for counteracting the effect of the spring 123 which would serve normally to maintain the grease-pumping mechanism in inoperative position. For this purpose, I may provide the Bowden cable or other suitable pulling cable 125, provided with the outer casing 126, one end of the cable 125 being attached to hose 110, the longer end of the bell crank lever serving as a handle which may be manipulated by the operator when he seizes the operative end of the discharge pipe or hose 110 to pull on the cable 125, the other end of the cable 126 being secured to the outer end of the rod 121,

struction of the aforesaid illustrative embodi-- ment of the present invention. The manner of assembling the device will, it is believed, clearly appear from the foregoing description but may be briefly summarized as follows: The casting 13 being in the form specified, the sealing members 58, 75, 49 and 114 being assumed to be not applied, the pet-cock 65 may be inserted in the usual way and thereafter the grease or lubricating tank 18 may be applied by the application of the tank proper, the insertion of the hollow bolt 22, the application of the cover 19 and the boss 28, the follower 34 having previously been inserted about the hollow bolt 22.

The eccentric 12 having been applied in any suitable way to the shaft 11, the various parts the check valves 53 and 56 and their associated.

l the ,end 127 of a. bell crank lever having the shorter end 128 and being pivoted at 129 to thesteel bushing 99, the check valve 104 with the associated spring 103 and the associated parts, are inserted in the casting portin98, after which the cap 114 may be screwed into place. The various nipple connections 62, 81 and 109 may be secured and the associated parts positioned in a manner which will readily be apparent to those skilled in the art to which the present invention relates, thus completing the assembly of the device.

The mode of operation of the device illustrated in theforegoing drawing and described in the foregoing specification will, it is believed, clearly appear a from the foregoing specification and drawing but may be briefly summarized as follows:

In operating the device, the operator may proceed substantially as follows: In order to fill, charge or service the device, the boss 28 is unscrewed from the threaded upper end 29 of the hollow bolt 22, after which the cover 19 carrying the sealing cup 20 may be removed. With the tank 18 discharged of lubricant, the iol lower 34 may be pushed down in the tank, the pet-cock 65 being moved from the position shown in the single figure of the drawing into a position which will connect port 68 with port 69, thus permitting the hydraulic fluid in the nature of lubricating oil in the lower compartment 38 of the tank 18 to be discharged into the reservoir 40.

The depression of the follower 34 may be eifected by filling the upper space 21 of the tank 18w'lth'the heavy or other lubricating grease to be used. At this time the valve 65 is positioned so as to connect the passage 68 with the passage 69, thus permitting the fluid in the lower portion 38 of the tank 18 to flow into the reservoir 40. When this operation is completed, the valve 65 should be returned to its: position connecting the passages 63 and 68. Assuming, now, that the motor is started, causing the shaft 11 carrying the eccentric 12 to rotate, and assuming also that the operator has not operated the bell crank 'lever 130 to bring the cam 117 into the position which it occupies in the single figure of the drawing, the grease plunger 92 and the plunger cup 113 associated therewith will be kept out of operative contact with the eccentric 12 by the action of the cam 117. The plunger 45, on the other hand, will have the end 4'7 thereof in operative contact with the eccentric 12 by means of the spring 46 for that'purpose. Hydraulic fluid, for

example, lubricating oil, from the reservoir to will thus be pumped by the plunger 45 past the check valve 53 intothe elbow 60 through the conduit 41, the nipple 62, into the L-shaped port 67 of the pet-cock65, and thence through the port 68 into the annular channel through the ports 1616 into the space 38 in the lower portion of the tank 18 beneath the follower 34. The pressure of the hydraulic fluid will not, however, without the operation of the grease pump en.- bodying the plunger 92, be suflicient to lift the follower and to force the hard grease or other lubricant out of the space 21 in the tank 18. Accordingly, when the pressure for which the bypass valve embodying the check valve 78 has been set is exceeded, lubricating oil will be forced into the conduit '79 through thenipple 80 into the space 82 to lubricate the lower portion of the plunger 92 and to pass through the port 84 back into the reservoir 40. After all the grease has been ejected from the tank 18, and toremove the pressure of the oil from the tank 18, the pet-cock 64 1s turned by means of its handle 66 so that the L-shaped portion 6'7 now connects passages 88 and 69, thus permitting the oil to run back into the follower 34 in the space 38 in the lower po'r- "910 tion of the tank 18, to force grease under high pressure through the nipple 109, the hose 110, to the outlet 111 supplied with'the bayonet or other connection 112.

This operation may continue any number of Q;

times until the tank 18 is exhausted. It may here be stated that when the tank is completely exhausted, and it is desired to recharge the same, the pet-cock 65 is moved from the position shown in the single figure of the drawing, which corresponds to the position in which heavy grease or lubricant will be discharged from the upper compartment 21 of the container 18, to a position at right angles in which the hydraulic fluidin the form of lubricating oil in the compartment 38 beneath the follower 34 will be passed from such compartment through the port 68, the L-shaped port 67, port 69 back into the reservoir 40. At the same time the'tank 18 can be recharged by putting heavy grease or other lubricant in the upper compartmentZl above the follower 34, thus preparing the device for the further discharge 01 grease or other lubricant.

This completes the description of the mode of operation of the aforesaid illustrative embodiment of the present invention. It will be noted that the device is simple in'construction, may be conveniently fabricated and assembledand is highly efficient in operation. By means of the devices of the present invention highly difllcult and heavy lubricants may be pumped under high pressure and with a very satisfactory rate of feed. The device itself is further characterized by its substantial freedom from clogging, overheating, stoppages, air pockets and'other defects which would hinder its eflicient operation, while permitting a high rate of delivery with'low power consumption and eincient control of the lubricating operation.

Other superiorities and advantages of the devices of the present invention, particularly asexemplified in the foregoing illustrative embodiment of the same, will readily occur to those skilled in the art to which the present invention applying hydraulic pressure to said separating member to impart movement to the same to discharge lubricant from the same through said outlet means-in combination with auxiliary pumping mechanism for pumping the lubricant being discharged from said container by the hydraulic pressure applied thereto by the movement of said separating member in said container, and means for utilizing a portion at least of said lubricating hydraulic fluid for lubricating a portion at least of said auxiliary pumping mechanism.

2. In a device for pumping lubricant, a container providing a source of supply of lubricant, outlet means communicating with said source of supply within said container, a separating member within said container on one side of which lies said source of supply of lubricant, and means embodying pumping mechanism and a source of supply of lubricating fluid communicating with said container on the other side of said separating member for applying hydraulic pressure to said separating member to impart movement to the same to discharge lubricant from the same through said outlet means, in combination with auxiliary pumping mechanism for pumping the lubricant being discharged from said container by the hydraulic pressure applied thereto by the movement of said separating member in said container, and means for utilizing a portion at least of said lubricating fluid for lubricating a portion at least of said auxiliary pumping mechanism.

3. In a device for pumping lubricant, a container providing a source of supply of lubricant, outlet means communicating with said source of supply within said container, a separating member within said container on one side of which lies said source of supply of lubricant, and means embodying pumping mechanism and a source of supply of lubricating fluid communicating with said container on the other side of said separating member for applying hydraulic pressure to said separating member to impart movement to the same to discharge lubricant from the same through said outlet means, motor-operated means for maintaining said hydraulicpressure-applying means in continuous operation, in combination with auxiliary pumping mechanism for pumping the lubricant being discharged from said container by the hydraulic pressure applied thereto by the movement of said separating member in said container, means for utilizing a portion at least of said lubricating fluid for lubricating a por-- tion at least of said auxiliary pumping mechanism, and manually controlled means associated with said motor-operated means for controlling said auxiliary pumping mechanism upon the actuation of said manually controlled means.

4. In a device for pumping lubricant, a container providing a source of supply of lubricant, outlet means communicating with said source of supply within said container, a separating member within said container on one side of which lies said source of supply of lubricant, and means embodying pumping mechanism and a source of supply of hydraulic fluid communicating with said container on the other side of said separating member for applying hydraulic pressure to said separating member to impart movement to the same to discharge lubricant from the same through said outlet means, motor-operated means for maintaining said hydraulic-pressure-applying means in continuous operation, in combination with auxiliary pumping mechanism for pumping the lubricant being discharged from said container by the hydraulic pressure applied thereto by the movement of said separating member in said container, means for utilizing a portion at least of said hydraulic fluid for lubricating a portion at least of said auxiliary pumping mechanism, and manually controlled means associated with said motor-operated means for controlling said auxiliary pumping mechanism upon the actuation of said manually controlled means.

5. In a device for pumping lubricant, a container providing a source of supply of lubricant, outlet means communicating with said source of supply within said container, a separating member within said container on one side of which lies said source of supply of lubricant, and means comprising a source of supply of hydraulic fluid communicating with said container on the other side of said separating member for applying hydraulic pressure to said separating member to impart movement to the same to discharge lubricant from the same through said outlet means, motor-operated means for maintaining said hydraulic-pressure-applying means in continuous operation, in combination with auxiliary pumping mechanism for pumping the lubricant being discharged from said container by the hydraulic pressure applied thereto by the movement of said separating member in said container, means for utilizing a portion at least of said hydraulic fluid for lubricating a portion at least of said auxiliary pumping mechanism, and manually controlled means associated with said motor-operated means for controlling said auxiliary pumping mechanism upon the actuation of said manually controlled means.

6. In a device for pumping lubricant, a container providing a source of supply of lubricant, outlet means communicating with said source of supply within said container, a separating member within said container on one side of which lies said source of supply of lubricant and means comprising a source of supply of lubricating hydraulic fluid communicating with said container on the other side or" said separating member for applying hydraulic pressure to said separating member to impart movement to the same to discharge lubricant from the same through said outlet means, motor-operated means for maintaining said hydraulic-pressure-applying means in continuous operation, in combination with auxiliary pumping mechanism for pumping the lubricant being discharged from said container by the hydraulic pressure applied thereto by the movement of said separating member in said container, means for utilizing a portion at least of said lubricating-hydraulic fluid for lubricating a portion at least of said auxiliary pumping. mechanism, and manually controlled means associated with said motor-operated means for controlling said auxiliary pumping mechanism upon the actuation of said manually controlled means.

7. In a device for pumping lubricant, a container providing a source of supply of lubricant, outlet means communicating with said source of supply within said container, a separating member within said container on one side of which lies said source of supply of lubricant, and

means embodying pumping mechanism and a.

pressure-applying means in continuous operation, in combination with auxiliary pumping, mechanism for pumping the lubricant being discharged from said container by the hydraulic pressure applied thereto by the movement of said separating member in said container, means for utilizing a portion at least of said lubricating fluid for lubricating a portion at least of said auxiliary pumping mechanism and manually controlled,

means associated with said motor-operated means for controlling said auxiliary pumping mechanism upon the actuation of said manually controlled means. I

ANTHONY BIZZARRI. 

